Diversification of the shell shape and size in Baikal Candonidae ostracods inferred from molecular phylogeny.

ABSTRACT: Ostracod shells are used extensively in paleontology, but we know little about their evolution, especially in ancient lakes. Lake Baikal (LB) is the world's most important stronghold of Candonidae diversity. These crustaceans radiated here rapidly (12-5 Ma) and with an unprecedented morphological diversity. We reconstruct their molecular phylogeny with 46 species and two markers (18S and 16S rRNA), and use it to estimate the evolution of the shell shape and size with landmark-based geometric morphometrics (LBGM). High posterior probabilities support four major clades, which differ in node depth and morphospace clustering. After removing a significant allometry, the first three principal components (PCs) describe about 88% of total variability, suggesting a strong integration. Reconstructed

SUBMITTER: Karanovic I 

PROVIDER: S-EPMC9941104 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature